sample.flac is the unmodified LibriSpeech test-clean utterance 1089-134686-0001.
LibriSpeech ASR corpus (2015), Vassil Panayotov, Guoguo Chen, Daniel Povey and Sanjeev Khudanpur.
Source: https://www.openslr.org/12
License: Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/
Reference text: stuff it into you his belly counselled him
